Anthropic prices no gateway-spelled model id, while the effort policy one file away normalizes them deliberately

[sroussey]

What

Two files in providers/anthropic disagree about what a Bedrock / Vertex model id is.

Anthropic_EffortPolicy.ts:18-28 strips the gateway prefix on purpose, and the docstring says why:

/** ... having them fall out of the parser as "not a Claude id at all". */
const GATEWAY_PREFIX = /^(?:[a-z0-9-]+\.)*anthropic\./i;

function isPreThinkingClaude(id: string): boolean {
  const parsed = parseAnthropicModelId(id.replace(GATEWAY_PREFIX, ""));
  ...

Anthropic_Pricing.ts:283 does not:

return resolveModelPricingFromTable(ANTHROPIC_PRICING, modelId, ["anthropic/"]);

["anthropic/"] is a slash-suffixed npm-style prefix. It does not match us.anthropic. / eu.anthropic. / anthropic..

Executed at 2d36880 (real modules, provider_config.model_name set):

id                                           effort.supported  effort.default   pricing
claude-sonnet-5                              6                 none             in=2 out=10 cached=0.2
us.anthropic.claude-sonnet-4-20250514-v1:0   6                 none             UNPRICED
anthropic.claude-3-5-sonnet-20241022-v2:0    0                 undefined        UNPRICED

Row 2 is the bug: the same model, on a gateway spelling the package explicitly supports for reasoning, resolves no rate card. Row 3 is correct for a different reason (pre-3.7, no dial) and is also unpriced, which it should not be — Claude 3.5 Sonnet has a published rate.

Why it matters

• This is the safe direction — unpriced reports nothing rather than a wrong number — so it is lower severity than a fabricated rate. But it is silent: a host running Claude through Bedrock gets a cost estimate of "unknown" on every call with nothing saying why, while the reasoning dial works.
• GATEWAY_PREFIX exists because this review asked for it (ModelEffortPolicy became a contract without its six regexes being revisited #859) and the fix argued the case explicitly: gateway spellings must "grade the same as native ids". Pricing is the other half of that same claim and was not updated with it.
• assertPricedGapDoesNotGrow (pricingMatchesModality.ts:99-133), added this window, is exactly the assertion that would have caught it — KNOWN_UNPRICED.anthropic is [] — except no gateway-spelled id appears in PROVIDER_CASES (inferAdvertisesRegistered.test.ts:56-90), so the axis has nothing to fail on.

Proposed fix

1. Strip the same prefix in getAnthropicModelPricing, from the same exported constant rather than a copy — the pattern Xai_Pricing.ts / Xai_EffortPolicy.ts adopted this window (export const XAI_IMAGE_MODEL, imported by pricing, "one matcher, so the two cannot drift"):

   // Anthropic_EffortPolicy.ts
   export const ANTHROPIC_GATEWAY_PREFIX = /^(?:[a-z0-9-]+\.)*anthropic\./i;
   
   // Anthropic_Pricing.ts
   export function getAnthropicModelPricing(modelId: string | undefined): ModelPricing | undefined {
     return resolveModelPricingFromTable(
       ANTHROPIC_PRICING,
       modelId?.replace(ANTHROPIC_GATEWAY_PREFIX, ""),
       ["anthropic/"]
     );
   }

   Note a gateway id also carries a -v1:0 suffix; KEY_SUFFIX_BOUNDARY admits - so claude-sonnet-4-20250514-v1:0 will walk back to claude-sonnet-4-* on its own, but confirm against the table rather than assuming.

2. Add one gateway-spelled id to PROVIDER_CASES for anthropic, so assertPricedGapDoesNotGrow guards it thereafter. It fails today and passes after (1), which is the argument for adding it in the same commit.

Found during the 2026-09-14 review of providers/. Verified against origin/main @ 2d36880.